NaNO2–Ceric ammonium nitrate mediated conversion of acrylic esters and Baylis–Hillman derived acrylic esters into corresponding β-nitro acrylic esters
作者:K Jayakanthan、K.P Madhusudanan、Yashwant D Vankar
DOI:10.1016/j.tet.2003.11.013
日期:2004.1
A variety of acrylicesters, including those derived from Baylis–Hillman reactions, react with NaNO2–ceric ammonium nitrate to form the corresponding β-nitro alcohols 2 and 5 whose dehydration, via their mesylates, leads to β-nitro acrylicesters, in good to excellent yields. Further, β-nitro acrylicesters containing a mesylate group 6, obtained from the Baylis–Hillman products, react with NaN3 to
[EN] 2-OXO-OXAZOLIDINE-5-CARBOXAMIDES AS NAV1.8 INHIBITORS<br/>[FR] 2-OXOIMIDAZOLIDINE-5-CARBOXAMIDES UTILES EN TANT QU'INHIBITEURS DE NAV1.8
申请人:MERCK SHARP & DOHME
公开号:WO2021257418A1
公开(公告)日:2021-12-23
Novel compounds of the structural formula (I), and the pharmaceutically acceptable salts thereof, are inhibitors of Nav1.8 channel activity and may be useful in the treatment, prevention, management, amelioration, control and suppression of diseases mediated by Nav1.8 channel activity. The compounds of the present invention may be useful in the treatment, prevention or management of pain disorders, cough disorders, acute itch disorders, and chronic itch disorders.
Switchable-Hydrophilicity Solvents for Product Isolation and Catalyst Recycling in Organocatalysis
作者:Julia Großeheilmann、Jesse R. Vanderveen、Philip G. Jessop、Udo Kragl
DOI:10.1002/cssc.201501654
日期:2016.4.7
Switchable‐hydrophilicity solvents (SHSs) are solvents that can switch reversibly between a water‐miscible state to a state that forms a biphasic mixture with water. In this case study, SHSs have been studied for easy product/catalyst separation as well as catalystrecycling. A series of tertiary amine SHSs have been identified for the extraction of the hydrophilic product from the postreaction mixture
Enantioselective catalysis of the Henry reaction by a chiral macrocyclic ytterbium complex in aqueous media
作者:Shashi U. Pandya、Rachel S. Dickins、David Parker
DOI:10.1039/b712470h
日期:——
A chiral macrocyclic ytterbium cationic complex catalyses the nitro-aldol reaction between α-ketocarboxylates and nitromethane under ambient aqueous conditions, leading to the formation of for example, methyl-2-hydroxy-2-methyl-3-nitropropanoate in 96% yield and 59% enantiomeric purity. Monitoring of the paramagnetically shifted intermediate Yb species by 1H NMR allows several different species on the catalytic cycle to be identified and is consistent with the intermediacy of stereoisomeric chelated pyruvates of differing reactivity towards the nucleophile, as well as product inhibition of turnover.